Manuals?

I'm sure they're all over the internet for sale, but I was wondering if anyone knew of a respected website that sells copies of old WWII field manuals, primarily for rifle platoons, squad tactics, and anything relating to B-17s.

The bookshelves section of the US Army military history site is worth a look for training and doctrine material too:Online Bookshelvesas is the field artillery journal: FAMAG_Archives(not specifically manuals but definitely used for disseminating training ideas and current thinking to the troops.)